Method, user equipment, base station, and system for enhancing reliability of wireless communication

ABSTRACT

The present application provides a method for enhancing reliability of wireless communication, comprising: monitoring, by a user equipment (UE), quality of downlink transmission between the UE and a base station (BS); and measuring, by the UE in response to a trigger event, transmission quality of at least one beam used for the downlink transmission between the UE and the BS, wherein the trigger event is used to indicate that quality of the downlink transmission between the UE and the BS does not meet a first preset condition. The present application further discloses another method for enhancing reliability of wireless communication and a related device and system. By means of the solutions disclosed in the present application, transmission quality of a beam used for uplink/downlink transmission between a BS and a UE can be non-periodically measured based on event trigger, which improves real-time performance of detection and greatly enhances reliability of wireless communication.

CROSS REFERENCE TO RELATED APPLICATION

The present application is based on and claims the benefit of priorityto Chinese Application No. 201610079299.3, filed on Feb. 4, 2016, theentire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present application relates to the field of wireless communications,and in particular, to a method, a user equipment (UE), a base station(BS), and a system for enhancing reliability of wireless communication.

BACKGROUND

In recent years, high frequency wireless communication attractsincreasing attention due to abundant spectrum resources thereof. Forexample, if frequency exceeds 6 GHz, bandwidth can reach 100 MHz. Suchabundant spectrum resources are important to a future wireless broadbandcommunications system. Therefore, a high frequency wirelesscommunications technology has been considered as one of the mostimportant technologies in next ten years.

Certainly, the high frequency wireless communication also hasdisadvantages, and one of them is an excessively large transmissionloss. To make up this disadvantage, a beam forming technology is usuallyapplied to increase receive power. In the beam forming technology, asending party focuses transmit power in a particular direction bydeploying a lot of antennas, to ensure a signal to noise ratio (SNR) ofa receiving party. The transmit power focusing requires small beamdispersion, which leads to a narrow transmission range of a beam in theparticular direction. In this case, even though a location of thereceiving party changes a little, an error may occur in beam matching,and greatly affects receive power of the receiving party.

To discover the beam mismatching phenomenon in time, in the prior art, aBS usually periodically sends a reference signal (RS) to a UE by usingdifferent beams in sequence. The UE can know transmission quality of thedifferent beams according to these periodic RSs.

However, in an actual case, there are a lot of beams used foruplink/downlink transmission between the BS and the UE. Therefore, thetechnical solution in the prior art in which the BS periodically sendsan RS to the UE has low efficiency. If transmission quality of a beamcurrently serving the BS and the UE (serving beam, which is referred toas an active beam below) or a beam currently not serving the BS and theUE (non-serving beam, which is referred to as a standby beam below)deteriorates, the UE or the BS may take a long time to discover thedeterioration, which greatly reduces reliability of wirelesscommunication.

SUMMARY

An objective of the present application is to provide a method, a UE, aBS, and a system for enhancing reliability of wireless communication.

According to a first aspect of at least one embodiment of the presentapplication, a method for enhancing reliability of wirelesscommunication is provided, comprising:

monitoring, by a UE, quality of downlink transmission between the UE anda BS; and

measuring, by the UE in response to a trigger event, transmissionquality of at least one beam used for the downlink transmission betweenthe UE and the BS, wherein

the trigger event is used to indicate that quality of the downlinktransmission between the UE and the BS does not meet a first presetcondition.

According to a second aspect of at least one embodiment of the presentapplication, another method for enhancing reliability of wirelesscommunication is provided, comprising:

monitoring, by a BS, quality of uplink transmission between a UE and theBS; and

measuring, by the BS in response to a trigger event, transmissionquality of at least one beam used for the uplink transmission betweenthe BS and the UE, wherein the trigger event is used to indicate thatquality of the uplink transmission between the BS and the UE does notmeet a first preset condition.

According to a third aspect of at least one embodiment of the presentapplication, a UE for enhancing reliability of wireless communication isprovided, comprising:

a monitoring module, configured to monitor quality of downlinktransmission between the UE and a BS; and

a measurement module, configured to measure, in response to a triggerevent, transmission quality of at least one beam used for the downlinktransmission between the UE and the BS, wherein

the trigger event is used to indicate that quality of the downlinktransmission between the UE and the BS does not meet a first presetcondition.

According to a fourth aspect of at least one embodiment of the presentapplication, a BS for enhancing reliability of wireless communication isprovided, comprising:

a monitoring module, configured to monitor quality of uplinktransmission between a UE and the BS; and

a measurement module, configured to measure, in response to a triggerevent, transmission quality of at least one beam used for the uplinktransmission between the BS and the UE, wherein the trigger event isused to indicate that quality of the uplink transmission between the BSand the UE does not meet a first preset condition.

According to a fifth aspect of at least one embodiment of the presentapplication, another UE for enhancing reliability of wirelesscommunication is provided, comprising: a processor and a memory, whereinthe memory is configured to store an instruction, and the processor isconfigured to execute the instruction, to perform the following steps:

monitoring quality of downlink transmission between the UE and a BS; and

measuring, in response to a trigger event, transmission quality of atleast one beam used for the downlink transmission between the UE and theBS, wherein

the trigger event is used to indicate that quality of the downlinktransmission between the UE and the BS does not meet a first presetcondition.

According to a sixth aspect of at least one embodiment of the presentapplication, another BS for enhancing reliability of wirelesscommunication is provided, comprising: a processor and a memory, whereinthe memory is configured to store an instruction, and the processor isconfigured to execute the instruction, to perform the following steps:

monitoring quality of uplink transmission between a UE and the BS; and

measuring, in response to a trigger event, transmission quality of atleast one beam used for the uplink transmission between the BS and theUE, wherein the trigger event is used to indicate that quality of theuplink transmission between the BS and the UE does not meet a firstpreset condition.

According to a seventh aspect of at least one embodiment of the presentapplication, a system for enhancing reliability of wirelesscommunication is provided, comprising: a BS and a UE, wherein the UE isconfigured to monitor quality of downlink transmission between the UEand the BS; and measure, in response to a trigger event, transmissionquality of at least one beam used for the downlink transmission betweenthe UE and the BS, wherein the trigger event is used to indicate thatquality of the downlink transmission between the UE and the BS does notmeet a first preset condition.

According to an eighth aspect of at least one embodiment of the presentapplication, another system for enhancing reliability of wirelesscommunication is provided, comprising: a BS and a UE, wherein the BS isconfigured to monitor quality of uplink transmission between the UE andthe BS; and measure, in response to a trigger event, transmissionquality of at least one beam used for the uplink transmission betweenthe BS and the UE, wherein the trigger event is used to indicate thatquality of the uplink transmission between the BS and the UE does notmeet a first preset condition.

According to the method, UE, base station, and system for enhancingreliability of wireless communication in the embodiments of the presentapplication, transmission quality of a beam used for uplink/downlinktransmission between a BS and a UE can be non-periodically measuredbased on event trigger, which improves real-time performance ofdetection and greatly enhances reliability of wireless communication.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart of a method for enhancing reliability of wirelesscommunication according to an embodiment of the present application;

FIG. 2 is a flowchart of a method for enhancing reliability of wirelesscommunication according to another embodiment of the presentapplication;

FIG. 3 is a flowchart of a method for enhancing reliability of wirelesscommunication according to another embodiment of the presentapplication;

FIG. 4 is a flowchart of a method for enhancing reliability of wirelesscommunication according to another embodiment of the presentapplication;

FIG. 5 is a flowchart of a method for enhancing reliability of wirelesscommunication according to another embodiment of the presentapplication;

FIG. 6 is a flowchart of a method for enhancing reliability of wirelesscommunication according to another embodiment of the presentapplication;

FIG. 7 is a flowchart of another method for enhancing reliability ofwireless communication according to an embodiment of the presentapplication;

FIG. 8 is a flowchart of another method for enhancing reliability ofwireless communication according to another embodiment of the presentapplication;

FIG. 9 is a flowchart of another method for enhancing reliability ofwireless communication according to another embodiment of the presentapplication;

FIG. 10 is a flowchart of another method for enhancing reliability ofwireless communication according to another embodiment of the presentapplication;

FIG. 11 is a schematic structural diagram of a UE for enhancingreliability of wireless communication according to an embodiment of thepresent application;

FIG. 12 is a schematic structural diagram of a UE for enhancingreliability of wireless communication according to another embodiment ofthe present application;

FIG. 13 is a schematic structural diagram of a UE for enhancingreliability of wireless communication according to another embodiment ofthe present application;

FIG. 14 is a schematic structural diagram of a UE for enhancingreliability of wireless communication according to another embodiment ofthe present application;

FIG. 15 is a schematic structural diagram of a UE for enhancingreliability of wireless communication according to another embodiment ofthe present application;

FIG. 16 is a schematic structural diagram of a UE for enhancingreliability of wireless communication according to another embodiment ofthe present application;

FIG. 17 is a schematic structural diagram of another UE for enhancingreliability of wireless communication according to another embodiment ofthe present application;

FIG. 18 is a schematic structural diagram of a BS for enhancingreliability of wireless communication according to an embodiment of thepresent application;

FIG. 19 is a schematic structural diagram of a BS for enhancingreliability of wireless communication according to another embodiment ofthe present application;

FIG. 20 is a schematic structural diagram of a BS for enhancingreliability of wireless communication according to another embodiment ofthe present application;

FIG. 21 is a schematic structural diagram of a BS for enhancingreliability of wireless communication according to another embodiment ofthe present application; and

FIG. 22 is a schematic structural diagram of another BS for enhancingreliability of wireless communication according to another embodiment ofthe present application.

DETAILED DESCRIPTION

Specific implementing manners of the present application are furtherdescribed in detail below with reference to accompanying drawings andembodiments. The following embodiments are intended to describe thepresent application, but not to limit the scope of the presentapplication.

A person skilled in the art understands that, in the embodiments of thepresent application, sequence numbers of the following steps do not meanan execution order, the execution order of the steps should bedetermined according to their functions and internal logic, and shallnot be construed as a limitation to implementation processes of theembodiments of the present application.

In addition, terms such as “first” and “second” in the presentapplication are intended only to distinguish different steps, devices,modules, or the like, which neither represent any particular technicalmeaning, nor indicate a necessary logical order between them.

FIG. 1 is a flowchart of a method for enhancing reliability of wirelesscommunication according to an embodiment of the present application. Asshown in FIG. 1, the method may comprise:

S110: A UE monitors quality of downlink transmission between the UE anda BS.

S120: The UE measures, in response to a trigger event, transmissionquality of at least one beam used for the downlink transmission betweenthe UE and the BS, wherein the trigger event is used to indicate thatquality of the downlink transmission between the UE and the BS does notmeet a first preset condition.

By means of the method in this embodiment of the present application,transmission quality of a beam used for downlink transmission between aBS and UE can be non-periodically measured based on event trigger, whichimproves real-time performance of detection and greatly enhancesreliability of wireless communication.

Optionally, in this embodiment of the present application, the triggerevent may be one or a combination of the following events:

an event 1: transmission quality of an active beam used for the downlinktransmission between the UE and the BS does not meet a second presetcondition, for example, an SNR of the active beam used for the downlinktransmission between the UE and the BS is less than an SNR threshold;

an event 2: transmission quality of a standby beam used for the downlinktransmission between the UE and the BS does not meet a third presetcondition, for example, a packet loss rate of the standby beam used forthe downlink transmission between the UE and the BS exceeds a packetloss rate threshold;

an event 3: a time interval from a latest measurement of thetransmission quality of the at least one beam used for the downlinktransmission between the UE and the BS does not meet a fourth presetcondition, for example, the time interval from the latest measurement ofthe transmission quality of the at least one beam used for the downlinktransmission between the UE and the BS exceeds a time threshold; and anevent 4: a latency change of a channel used for the downlinktransmission between the UE and the BS does not meet a fifth presetcondition, for example, the latency change of the channel used for thedownlink transmission between the UE and the BS exceeds a preset range.

In an implementing manner of the present application, the first presetcondition in S120 may be any one of the second preset condition in theevent 1, the third preset condition in the event 2, the fourth presetcondition in the event 3, and the fifth preset condition in the event 4;or may be a combination of at least two of the second preset conditionin the event 1, the third preset condition in the event 2, the fourthpreset condition in the event 3, and the fifth preset condition in theevent 4.

Exemplarily, if the trigger event is the event 1, the first presetcondition in S120 may be the second preset condition. If the triggerevent is “the event 1+the event 2”, the first preset condition in S120may be a set of the second preset condition in the event 1 and the thirdpreset condition in the event 2.

Optionally, in another implementing manner of the present application,the second preset condition in the event 1 and/or the third presetcondition in the event 2 may be any performance parameter that canmeasure transmission quality, for example, the above-mentioned SNRthreshold or packet loss rate threshold, and certainly, may be anotherperformance parameter, which is not specifically limited in thisembodiment of the present application.

Optionally, in another implementing manner of the present application,the time threshold in the event 3 may be set according to a movementspeed of the UE. If the movement speed of the UE changes, the timethreshold may be adjusted correspondingly. For example, a fastermovement speed of the UE may indicate that the time threshold isadjusted smaller. In this way, when the UE moves at a high speed, a beammeasurement frequency can be improved, to ensure reliability of wirelesscommunication. Preferably, the movement speed of the UE may be anangular velocity of movement of the UE.

Optionally, as shown in FIG. 2, the measuring, by the UE, transmissionquality of at least one beam used for the downlink transmission betweenthe UE and the BS in S120 may comprise:

S125: The UE measures, by using at least one RS, the transmissionquality of the at least one beam used for the downlink transmissionbetween the UE and the BS.

Optionally, as shown in FIG. 3, in an implementing manner of the presentapplication, the measuring, by the UE by using at least one RS, thetransmission quality of the at least one beam used for the downlinktransmission between the UE and the BS in S125 may comprise:

S125-A: The UE sends an RS request to the BS.

S125-B: The UE determines a time/frequency resource of an RS accordingto an RS grant that is sent by the BS in response to the RS request.

S125-C: The UE receives, on the time/frequency resource, at least one RSsent by the BS.

S125-D: The UE measures, according to the at least one RS, thetransmission quality of the at least one beam used for the downlinktransmission between the UE and the BS.

In this embodiment of the present application, the RS request may havemultiple formats, or even may be simply indicated by one bit.Optionally, the RS request may further carry information about the atleast one beam that is used for the downlink transmission between the UEand the BS and that is to be measured by the UE, for example, a beamindex, which is not specifically limited in this embodiment of thepresent application.

After receiving the RS request, the BS arranges a downlink RStransmission for the UE, for example, determines a time or frequencyresource for transmitting the RS. After determining the time orfrequency resource for the RS, the BS may send an RS grant to the UE, tonotify the arranged information to the UE. After receiving the RS grant,the UE knows the time or frequency resource on which the BS sends the RSto the UE, and can receive, on a corresponding time or frequencyresource, the RS from the BS. If there are multiple beams used for thedownlink transmission between the UE and the BS, the BS sends multipleRSs to the UE by using the multiple beams, and the UE can measuretransmission quality of each beam by using an RS that is received byusing the corresponding beam. For example, the UE may detect atransmission latency or an SNR of the corresponding beam according tothe received RS, and the UE can know the transmission quality of thecorresponding beam according to these performance measurementparameters.

Exemplarily, the RS grant may be carried in a symbol that is in adownlink subframe and that is reserved for control information, andcertainly, may be transmitted to the UE in another manner, which is notspecifically limited in this embodiment of the present application.

Optionally, as shown in FIG. 4, in another implementing manner of thepresent application, before the sending, by the UE, an RS request to theBS (S125-A), the method may further comprise:

S125-Z: The UE receives RS configuration information sent by the BS.

Exemplarily, the RS configuration information may comprise a format ofthe RS request. Different UEs may have different RS request formats. TheUE may generate, according to the RS configuration information, an RSrequest that meets a BS requirement. Alternatively, the RS configurationinformation may comprise the trigger event. According to the RSconfiguration information, the UE can know in advance what event shouldbe monitored. Once the event is detected, the UE is triggered to measurethe transmission quality of the at least one beam used for the downlinktransmission between the UE and the BS. Alternatively, the RSconfiguration information may comprise both the format of the RS requestand the trigger event. Alternatively, the RS configuration informationmay comprise other information, which is not specifically limited inthis embodiment of the present application.

Optionally, as shown in FIG. 5, in another implementing manner of thepresent application, the method may further comprise:

S125-E: The UE returns ACK signaling to the BS, wherein the ACKsignaling is used to indicate that the UE has received the RS grantand/or the measurement has been completed.

S125-E may be performed after S125-B, or may be performed after S125-D,which is not limited in this embodiment of the present application.

Optionally, as shown in FIG. 6, in another implementing manner of thepresent application, after the measuring, by the UE in response to atrigger event, transmission quality of at least one beam used for thedownlink transmission between the UE and the BS (S120), the method mayfurther comprise:

S130: The UE selects a beam according to a measurement result.

For example, if the UE determines, according to the measurement result,that transmission quality of a current active beam cannot meet atransmission requirement, the UE reselects a beam as a new active beamfor the downlink transmission.

In this implementing manner of the present application, the downlinktransmission between the UE and the BS may be downlink data transmissionbetween the UE and the BS, or may be downlink control signalingtransmission between the UE and the BS, or a set of the two types ofdownlink transmission, which is not specifically limited in thisembodiment of the present application.

FIG. 7 is a flowchart of a method for enhancing reliability of wirelesscommunication according to another embodiment of the presentapplication. As shown in FIG. 7, the method may comprise:

S710: A BS monitors quality of uplink transmission between a UE and theBS.

S720: The BS measures, in response to a trigger event, transmissionquality of at least one beam used for the uplink transmission betweenthe BS and the UE, wherein the trigger event is used to indicate thatquality of the uplink transmission between the BS and the UE does notmeet a first preset condition.

By means of the method in this embodiment of the present application,transmission quality of a beam used for uplink transmission between a BSand UE can be non-periodically measured based on event trigger, whichimproves real-time performance of detection and greatly enhancesreliability of wireless communication.

Similar to the downlink solution described above, in an optionalembodiment of the present application, the trigger event may be one or acombination of the following events:

an event A: transmission quality of an active beam used for the uplinktransmission between the UE and the BS does not meet a second presetcondition, for example, an SNR of the active beam used for the uplinktransmission between the UE and the BS is less than an SNR threshold;

an event B: transmission quality of a standby beam used for the uplinktransmission between the UE and the BS does not meet a third presetcondition, for example, a packet loss rate of the standby beam used forthe uplink transmission between the UE and the BS exceeds a packet lossrate threshold;

an event C: a time interval from a latest measurement of thetransmission quality of the at least one beam used for the uplinktransmission between the UE and the BS does not meet a fourth presetcondition, for example, the time interval from the latest measurement ofthe transmission quality of the at least one beam used for the uplinktransmission between the UE and the BS exceeds a time threshold; and

an event D: a latency change of a channel used for the uplinktransmission between the UE and the BS does not meet a fifth presetcondition, for example, the latency change of the channel used for theuplink transmission between the UE and the BS exceeds a preset range.

In an implementing manner of the present application, the first presetcondition in S720 may be any one of the second preset condition in theevent A, the third preset condition in the event B, the fourth presetcondition in the event C, and the fifth preset condition in the event D;or may be a combination of at least two of the second preset conditionin the event A, the third preset condition in the event B, the fourthpreset condition in the event C, and the fifth preset condition in theevent D.

Exemplarily, if the trigger event is the event A, the first presetcondition in S720 may be the second preset condition in the event A. Ifthe trigger event is “the event A+the event B”, the first presetcondition in S720 may be a set of the second preset condition in theevent A and the third preset condition in the event B.

Optionally, in another implementing manner of the present application,the second preset condition in the event A and/or the third presetcondition in the event B may be any performance parameter that canmeasure transmission quality, for example, the above-mentioned SNRthreshold or packet loss rate threshold, and certainly, may be anotherperformance parameter, which is not specifically limited in thisembodiment of the present application.

Optionally, as shown in FIG. 8, in an optional implementing manner, themeasuring, by the BS, transmission quality of at least one beam used forthe uplink transmission between the BS and the UE in S720 may comprise:

S725: The BS measures, by using at least one uplink sounding referencesignal (SRS), the transmission quality of the at least one beam used forthe uplink transmission between the UE and the BS.

Optionally, as shown in FIG. 9, in an optional implementing manner, themeasuring, by the BS by using at least one uplink SRS, the transmissionquality of the at least one beam used for the uplink transmissionbetween the UE and the BS in S725 may comprise:

S725-A: The BS sends SRS trigger signaling to the UE.

S725-B: The BS measures, according to at least one uplink SRS that issent by the UE in response to the SRS trigger signaling, thetransmission quality of the at least one beam used for the uplinktransmission between the UE and the BS.

Exemplarily, the SRS trigger signaling may carry information about theat least one beam that is used for the uplink transmission between theUE and the BS and that is to be measured by the BS, for example, a beamindex, which is not specifically limited in this embodiment of thepresent application.

Optionally, as shown in FIG. 10, in an optional implementing manner,after S725-A, the method may further comprise:

S725-C: The BS receives ACK signaling sent by the UE, wherein the ACKsignaling is used to indicate that the UE has received the SRS triggersignaling.

In this implementing manner of the present application, the uplinktransmission between the UE and the BS may be uplink data transmissionbetween the UE and the BS, or may be uplink control signalingtransmission between the UE and the BS, or a set of the two types ofuplink transmission, which is not specifically limited in thisembodiment of the present application.

FIG. 11 is a schematic structural diagram of a UE for enhancingreliability of wireless communication according to another embodiment ofthe present application. Referring to FIG. 11, the UE may comprise:

a monitoring module 1110, configured to monitor quality of downlinktransmission between the UE and a BS; and

a measurement module 1120, configured to measure, in response to atrigger event, transmission quality of at least one beam used for thedownlink transmission between the UE and the BS, wherein the triggerevent is used to indicate that quality of the downlink transmissionbetween the UE and the BS does not meet a first preset condition.

Optionally, as shown in FIG. 12, in an implementing manner of thepresent application, the measurement module 1120 may comprise:

a measurement submodule 1121, configured to measure, by using at leastone RS, the transmission quality of the at least one beam used for thedownlink transmission between the UE and the BS.

Optionally, as shown in FIG. 13, in an implementing manner of thepresent application, the measurement submodule 1121 may comprise:

a first sending unit 1121-A, configured to send an RS request to the BS;

a determining unit 1121-B, configured to determine a time/frequencyresource of an RS according to an RS grant that is sent by the BS inresponse to the RS request;

a first receiving unit 1121-C, configured to receive, on thetime/frequency resource, at least one RS sent by the BS; and

a measurement unit 1121-D, configured to measure, according to the atleast one RS, the transmission quality of the at least one beam used forthe downlink transmission between the UE and the BS.

Optionally, as shown in FIG. 14, in an implementing manner of thepresent application, the measurement submodule 1121 may furthercomprise:

a second receiving unit 1121-E, configured to receive RS configurationinformation sent by the BS.

Optionally, as shown in FIG. 15, in an implementing manner of thepresent application, the measurement submodule 1121 may furthercomprise:

a second sending unit 1121-F, configured to return ACK signaling to theBS, wherein the ACK signaling is used to indicate that the UE hasreceived the RS grant and/or the measurement has been completed.

Optionally, as shown in FIG. 16, in an implementing manner of thepresent application, the UE may further comprise:

a selection module 1130, configured to select a beam according to ameasurement result.

FIG. 17 is a schematic structural diagram of another UE for enhancingreliability of wireless communication according to another embodiment ofthe present application. Referring to FIG. 17, the UE may comprise aprocessor 1730 and a memory 1710, wherein the memory 1710 is configuredto store an instruction, and the processor 730 is configured to executethe instruction, to perform the following steps:

monitoring quality of downlink transmission between the UE and a BS; and

measuring, in response to a trigger event, transmission quality of atleast one beam used for the downlink transmission between the UE and theBS, wherein the trigger event is used to indicate that quality of thedownlink transmission between the UE and the BS does not meet a firstpreset condition.

A person of skill in the art may clearly understand that, for ease andbrevity of description, for a specific working process of the describedUE for enhancing reliability of wireless communication, refer to acorresponding process description of any one of the methods forenhancing reliability of wireless communication in the foregoing methodembodiments shown in FIG. 1 to FIG. 6. Details are not described hereinagain.

In conclusion, by means of the UE for enhancing reliability of wirelesscommunication in this embodiment of the present application,transmission quality of a beam used for downlink transmission between aBS and a UE can be non-periodically measured based on event trigger,which improves real-time performance of detection and greatly enhancesreliability of wireless communication.

FIG. 18 is a schematic structural diagram of a BS for enhancingreliability of wireless communication according to another embodiment ofthe present application. Referring to FIG. 18, the BS may comprise:

a monitoring module 1810, configured to monitor quality of uplinktransmission between a UE and the BS; and

a measurement module 1820, configured to measure, in response to atrigger event, transmission quality of at least one beam used for theuplink transmission between the BS and the UE, wherein the trigger eventis used to indicate that quality of the uplink transmission between theBS and the UE does not meet a first preset condition.

Optionally, as shown in FIG. 19, in an implementing manner of thepresent application, the measurement module 1820 may comprise:

a measurement submodule 1821, configured to measure, by using at leastone uplink SRS, the transmission quality of the at least one beam usedfor the uplink transmission between the UE and the BS.

Optionally, as shown in FIG. 20, in an implementing manner of thepresent application, the measurement submodule 1821 may comprise:

a sending unit 1821-A, configured to send SRS trigger signaling to theUE; and

a measurement unit 1821-B, configured to measure, according to at leastone uplink SRS that is sent by the UE in response to the SRS triggersignaling, the transmission quality of the at least one beam used forthe uplink transmission between the UE and the BS.

Optionally, as shown in FIG. 21, in an implementing manner of thepresent application, the measurement submodule 1821 may furthercomprise:

a receiving unit 1821-C, configured to receive ACK signaling sent by theUE, wherein the ACK signaling is used to indicate that the UE hasreceived the SRS trigger signaling.

FIG. 22 is a schematic structural diagram of another BS for enhancingreliability of wireless communication according to another embodiment ofthe present application. Referring to FIG. 22, the BS may comprise aprocessor 2230 and a memory 2210, wherein the memory 2210 is configuredto store an instruction, and the processor 2230 is configured to executethe instruction, to perform the following steps:

monitoring quality of uplink transmission between a UE and the BS; and

measuring, in response to a trigger event, transmission quality of atleast one beam used for the uplink transmission between the BS and theUE, wherein the trigger event is used to indicate that quality of theuplink transmission between the BS and the UE does not meet a firstpreset condition.

A person of skill in the art may clearly understand that, for ease andbrevity of description, for a specific working process of the describedBS for enhancing reliability of wireless communication, refer to acorresponding process description of any one of the methods forenhancing reliability of wireless communication in the foregoing methodembodiments shown in FIG. 7 to FIG. 10. Details are not described hereinagain.

In conclusion, by means of the BS for enhancing reliability of wirelesscommunication in this embodiment of the present application,transmission quality of a beam used for uplink transmission between a BSand a UE can be non-periodically measured based on event trigger, whichimproves real-time performance of detection and greatly enhancesreliability of wireless communication.

Another embodiment of the present application further provides aschematic structural diagram of a system for enhancing reliability ofwireless communication. The system may comprise a BS and any one of theUEs for enhancing reliability of wireless communication in the foregoingembodiments shown in FIG. 11 to FIG. 17.

Another embodiment of the present application further provides aschematic structural diagram of another system for enhancing reliabilityof wireless communication. The system may comprise a UE and any one ofthe BSs for enhancing reliability of wireless communication in theforegoing embodiments shown in FIG. 18 to FIG. 22.

A person of ordinary skill in the art may be aware that, in combinationwith the examples described in the embodiments disclosed in thisspecification, units and method steps may be implemented by electronichardware or a combination of computer software and electronic hardware.Whether the functions are performed by hardware or software depends onparticular applications and design constraint conditions of thetechnical solutions. A person skilled in the art may use differentmethods to implement the described functions for each particularapplication, but it should not be considered that the implementationgoes beyond the scope of the present application.

When the functions are implemented in the form of a software functionalunit and sold or used as an independent product, the functions may bestored in a computer-readable storage medium. Based on such anunderstanding, the technical solutions of the present applicationessentially, or the part contributing to the prior art, or a part of thetechnical solutions may be implemented in a form of a software product.The computer software product is stored in a storage medium, andcomprises several instructions for instructing a computer device (whichmay be a personal computer, a controller, a network device, or the like)to perform all or a part of the steps of the methods described in theembodiments of the present application. The storage medium comprises anymedium that can store program code, such as a USB flash drive, aremovable hard disk, a read-only memory (ROM), a RAM, a magnetic disk,or an optical disc.

The foregoing implementing manners are merely intended to describe thepresent application rather than limit the present application. A personof ordinary skill in the art may make modifications and variationswithout departing from the spirit and scope of the present application.Therefore, all equivalent technical solutions shall also fall within thescope of the present application, and the patent protection scope of thepresent application shall be subject to the claims.

What is claimed is:
 1. A method for enhancing reliability of wirelesscommunication, comprising: monitoring, by a user equipment (UE), qualityof downlink transmission between the UE and a base station (BS); andmeasuring, by the UE in response to a trigger event, transmissionquality of at least one beam used for the downlink transmission betweenthe UE and the BS, wherein the trigger event is used to indicate thatquality of the downlink transmission between the UE and the BS does notmeet a first preset condition.
 2. The method of claim 1, wherein themeasuring, by the UE, transmission quality of at least one beam used forthe downlink transmission between the UE and the BS comprises:measuring, by the UE by using at least one reference signal (RS), thetransmission quality of the at least one beam used for the downlinktransmission between the UE and the BS.
 3. The method of claim 2,wherein the measuring, by the UE by using at least one RS, thetransmission quality of the at least one beam used for the downlinktransmission between the UE and the BS comprises: sending, by the UE, anRS request to the BS; determining, by the UE, a time/frequency resourceof an RS according to an RS grant that is sent by the BS in response tothe RS request; receiving, by the UE on the time/frequency resource, atleast one RS sent by the BS; and measuring, by the UE according to theat least one RS, the transmission quality of the at least one beam usedfor the downlink transmission between the UE and the BS.
 4. The methodof claim 3, wherein before the sending, by the UE, an RS request to theBS, the method further comprises: receiving, by the UE, RS configurationinformation sent by the BS.
 5. The method of claim 4, wherein the RSconfiguration information comprises: a format of the RS request and/orthe trigger event.
 6. The method of claim 3, wherein the RS requestcarries information about the at least one beam used for the downlinktransmission between the UE and the BS.
 7. The method of claim 3,wherein the method further comprises: returning, by the UE, ACKsignaling to the BS, wherein the ACK signaling is used to indicate thatthe UE has received the RS grant and/or the measurement has beencompleted.
 8. The method of claim 1, wherein after the measuring, by theUE, transmission quality of at least one beam used for the downlinktransmission between the UE and the BS, the method further comprises:selecting, by the UE, a beam according to a measurement result.
 9. Themethod of claim 1, wherein the trigger event comprises at least one ofthe following events: transmission quality of an active beam used forthe downlink transmission between the UE and the BS does not meet asecond preset condition; transmission quality of a standby beam used forthe downlink transmission between the UE and the BS does not meet athird preset condition; a time interval from a latest measurement of thetransmission quality of the at least one beam used for the downlinktransmission between the UE and the BS does not meet a fourth presetcondition; and a latency change of a channel used for the downlinktransmission between the UE and the BS does not meet a fifth presetcondition.
 10. The method of claim 9, wherein the method furthercomprises: adjusting a time threshold in response to a change of amovement speed of the UE.
 11. The method of claim 10, wherein themovement speed of the UE comprises: an angular velocity of movement ofthe UE.
 12. The method of claim 1, wherein the downlink transmissionbetween the UE and the BS comprises: downlink data transmission betweenthe UE and the BS; and/or downlink control signaling transmissionbetween the UE and the BS.
 13. A method for enhancing reliability ofwireless communication, comprising: monitoring, by a base station (BS),quality of uplink transmission between a user equipment (UE) and the BS;and measuring, by the BS in response to a trigger event, transmissionquality of at least one beam used for the uplink transmission betweenthe BS and the UE, wherein the trigger event is used to indicate thatquality of the uplink transmission between the BS and the UE does notmeet a first preset condition.
 14. The method of claim 13, wherein themeasuring, by the BS, transmission quality of at least one beam used forthe uplink transmission between the BS and the UE comprises: measuring,by the BS by using at least one uplink sounding reference signal (SRS),the transmission quality of the at least one beam used for the uplinktransmission between the UE and the BS.
 15. The method of claim 14,wherein the measuring, by the BS by using at least one uplink SRS, thetransmission quality of the at least one beam used for the uplinktransmission between the UE and the BS comprises: sending, by the BS,SRS trigger signaling to the UE; and measuring, by the BS according toat least one uplink SRS that is sent by the UE in response to the SRStrigger signaling, the transmission quality of the at least one beamused for the uplink transmission between the UE and the BS.
 16. Themethod of claim 15, wherein the SRS trigger signaling carriesinformation about the at least one beam used for the uplink transmissionbetween the UE and the BS.
 17. The method of claim 15, wherein themethod further comprises: receiving, by the BS, ACK signaling sent bythe UE, wherein the ACK signaling is used to indicate that the UE hasreceived the SRS trigger signaling.
 18. The method of claim 13, whereinthe trigger event comprises at least one of the following events:transmission quality of an active beam used for the uplink transmissionbetween the UE and the BS does not meet a second preset condition;transmission quality of a standby beam used for the uplink transmissionbetween the UE and the BS does not meet a third preset condition; a timeinterval from a latest measurement of the transmission quality of the atleast one beam used for the uplink transmission between the UE and theBS does not meet a fourth preset condition; and a latency change of achannel used for the uplink transmission between the UE and the BS doesnot meet a fifth preset condition.
 19. The method of claim 13, whereinthe uplink transmission between the UE and the BS comprises: uplink datatransmission between the UE and the BS; and/or uplink control signalingtransmission between the UE and the BS.
 20. A user equipment (UE) forenhancing reliability of wireless communication, comprising: amonitoring module, configured to monitor quality of downlinktransmission between the UE and a base station (BS); and a measurementmodule, configured to measure, in response to a trigger event,transmission quality of at least one beam used for the downlinktransmission between the UE and the BS, wherein the trigger event isused to indicate that quality of the downlink transmission between theUE and the BS does not meet a first preset condition.
 21. The UE ofclaim 20, wherein the measurement module comprises: a measurementsubmodule, configured to measure, by using at least one reference signal(RS), the transmission quality of the at least one beam used for thedownlink transmission between the UE and the BS.
 22. The UE of claim 21,wherein the measurement submodule comprises: a first sending unit,configured to send an RS request to the BS; a determining unit,configured to determine a time/frequency resource of an RS according toan RS grant that is sent by the BS in response to the RS request; afirst receiving unit, configured to receive, on the time/frequencyresource, at least one RS sent by the BS; and a measurement unit,configured to measure, according to the at least one RS, thetransmission quality of the at least one beam used for the downlinktransmission between the UE and the BS.
 23. The UE of claim 22, whereinthe measurement submodule further comprises: a second receiving unit,configured to receive RS configuration information sent by the BS. 24.The UE of claim 22, wherein the measurement submodule further comprises:a second sending unit, configured to return ACK signaling to the BS,wherein the ACK signaling is used to indicate that the UE has receivedthe RS grant and/or the measurement has been completed.
 25. The UE ofclaim 20, wherein the UE further comprises: a selection module,configured to select a beam according to a measurement result.
 26. Auser equipment (UE) for enhancing reliability of wireless communication,comprising a processor and a memory, wherein the memory is configured tostore an instruction, and the processor is configured to execute theinstruction, to perform the following steps: monitoring quality ofdownlink transmission between the UE and a base station (BS); andmeasuring, in response to a trigger event, transmission quality of atleast one beam used for the downlink transmission between the UE and theBS, wherein the trigger event is used to indicate that quality of thedownlink transmission between the UE and the BS does not meet a firstpreset condition.
 27. A base station (BS) for enhancing reliability ofwireless communication, comprising: a monitoring module, configured tomonitor quality of uplink transmission between a user equipment (UE) andthe BS; and a measurement module, configured to measure, in response toa trigger event, transmission quality of at least one beam used for theuplink transmission between the BS and the UE, wherein the trigger eventis used to indicate that quality of the uplink transmission between theBS and the UE does not meet a first preset condition.
 28. The BS ofclaim 27, wherein the measurement module comprises: a measurementsubmodule, configured to measure, by using at least one uplink soundingreference signal (SRS), the transmission quality of the at least onebeam used for the uplink transmission between the UE and the BS.
 29. TheBS of claim 28, wherein the measurement submodule comprises: a sendingunit, configured to send SRS trigger signaling to the UE; and ameasurement unit, configured to measure, according to at least oneuplink SRS that is sent by the UE in response to the SRS triggersignaling, the transmission quality of the at least one beam used forthe uplink transmission between the UE and the BS.
 30. The BS of claim29, wherein the measurement submodule further comprises: a receivingunit, configured to receive ACK signaling sent by the UE, wherein theACK signaling is used to indicate that the UE has received the SRStrigger signaling.
 31. A base station (BS) for enhancing reliability ofwireless communication, comprising a processor and a memory, wherein thememory is configured to store an instruction, and the processor isconfigured to execute the instruction, to perform the following steps:monitoring quality of uplink transmission between a user equipment (UE)and the BS; and measuring, in response to a trigger event, transmissionquality of at least one beam used for the uplink transmission betweenthe BS and the UE, wherein the trigger event is used to indicate thatquality of the uplink transmission between the BS and the UE does notmeet a first preset condition.
 32. A system for enhancing reliability ofwireless communication, comprising a base station (BS) and the userequipment (UE) of claim
 20. 33. A system for enhancing reliability ofwireless communication, comprising a user equipment (UE) and the basestation (BS) of claim 27.